Shockwave healing allies/damage enemies

[Crusher]

Why not throw a Dummy unit in forward line and order him to cast Healing Salve (AoE) every 0.5 seconds? Or just use negative value for shockwaye and set him to target allies.

 

[Summoned]

Shockwave cannot target friendly units. (And it will still hit enemies even if you set the Targets Allowed field to only Friend and Allied).

You have to create the spell dummy unit for an enemy for it to heal allies.